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Related Concept Videos

Exercise Stress Test01:26

Exercise Stress Test

Introduction
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...

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Related Experiment Video

Updated: Jun 19, 2026

Doppler Ultrasound-Based Leg Blood Flow Assessment During Single-Leg Knee-Extensor Exercise in an Uncontrolled Setting
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Published on: December 15, 2023

Within- and between-day repeatability and variability in children's physiological responses during submaximal

Paulo R S Amorim1, Nuala Mary Byrne, Andrew P Hills

  • 1Physical Education Department, Viçosa Federal University, Brazil. pramorim@ufv.br

Research Quarterly for Exercise and Sport
|October 2, 2009
PubMed
Summary

Children's oxygen uptake (VO2) and heart rate (HR) during treadmill walking are repeatable within and between days. This study confirms the reliability of these measurements for children walking at self-selected speeds.

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Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
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Last Updated: Jun 19, 2026

Doppler Ultrasound-Based Leg Blood Flow Assessment During Single-Leg Knee-Extensor Exercise in an Uncontrolled Setting
09:18

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Published on: December 15, 2023

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
07:26

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans

Published on: October 17, 2018

Area of Science:

  • Pediatric Exercise Physiology
  • Human Movement Science
  • Cardiorespiratory Fitness Assessment

Background:

  • Assessing cardiorespiratory fitness in children requires reliable measurement tools.
  • Treadmill walking is a common method for evaluating exercise responses in pediatric populations.
  • Understanding the repeatability of measurements like oxygen uptake (VO2) and heart rate (HR) is crucial for accurate data interpretation.

Purpose of the Study:

  • To verify the within- and between-day repeatability and variability of oxygen uptake (VO2), gross economy (GE), and heart rate (HR) in children.
  • To assess these physiological responses during treadmill walking at self-selected speeds (SS).

Main Methods:

  • Fourteen children (mean age 10.1 years) participated in three testing sessions over two days.
  • Measurements included oxygen uptake (VO2), gross economy (GE), and heart rate (HR) at four walking speeds, including self-selected speed (SS).
  • Repeatability and variability were analyzed using the Bland and Altman method and coefficients of variability (CV).

Main Results:

  • No statistically significant differences were found in within- or between-day coefficients of variability (CV) for VO2, GE, or HR at any tested speed.
  • The study verified the repeatability of VO2, GE, and HR measurements within and between days across all tested speeds.

Conclusions:

  • Submaximal oxygen uptake (VO2) during treadmill walking is stable and reproducible in children.
  • Measurements of VO2, GE, and HR at various speeds, including self-selected speed (SS), are reliable for pediatric populations.
  • These findings support the use of treadmill walking protocols for consistent physiological assessments in children.